Mumbai, Jun 23: State Bank of India today said RBI's direction to oil companies to procure half of their dollar requirements directly from a select group of PSU banks will not help stem the fall in rupee.

He said the bank carries a dollar position of up to $ 10 million on a daily basis and to support the large demand from oil marketing companies and Reliance Industries, the single largest importers of crude, it will have to raise money from the open market.

Concerned over rupee's downslide which touched an all time low of 57.37 a dollar today, RBI today asked oil firms, which are the largest buyers of the US currency, purchase 50 per cent of their dollar needs directly through a public sector bank.

RBI feels that oil firms seeking a single quote for their dollar requirement, instead of present practice of floating enquiring with several public and private sector banks, would help check volatility and arrest the free-fall of the rupee.

"It does not increase the overall availability. It is possibly to fend-off the criticism that the RBI is not doing enough," Chaudhuri said.

When asked if the changes bought in today will have any material impact on the exchange rate, he said, "in our understanding, no. It may let the RBI understand what is the demand coming from two or three sources."